This is my first post. So I would like to say hey ya'll

I plan to buy a new road bike soon and have narrowed it down to possibly one of the new Trek Emondas.
I want the most bang for my buck. Warranty is a plus as well. This is what I'm looking at.
Emonda S4 with Tiagra groupset I can buy for $1300 from my LBS (I've already talked myself out of this one because of the group)
Emonda S5 with 105 groupset for $1700
Emonda SL5 better carbon (will I be able to tell?)and 105 group and wires are ran internal but $2200 (this is actually over my budget, but do able)
I'm 35 years old. 215 lbs if this matters. Also I will mostly just be riding with friends on the weekends and possibly early mornings during the week.
Thanks in advance